81577350462 has 8 divisors (see below), whose sum is σ = 163154700936. Its totient is φ = 27192450152.

The previous prime is 81577350443. The next prime is 81577350499. The reversal of 81577350462 is 26405377518.

It is a sphenic number, since it is the product of 3 distinct primes.

81577350462 is an admirable number.

It is a super-3 number, since 3×81577350462³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6798112533 + ... + 6798112544.

It is an arithmetic number, because the mean of its divisors is an integer number (20394337617).

Almost surely, 2^81577350462 is an apocalyptic number.

81577350462 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81577350462 is a wasteful number, since it uses less digits than its factorization.

81577350462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13596225082.

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 81577350462 in words is "eighty-one billion, five hundred seventy-seven million, three hundred fifty thousand, four hundred sixty-two".